#程序文件Pz1_4.py
x1 = 58 + 32     #x1=90
x2 = 89 - 28     #x2=61
x3 = 3 * 12      #x3=36
x4 = 125 / 7     #x4=17.857142857142858
x5 =125 // 7     #整除，x5=17
x6 = 4**3        #4的3次幂，x6=64
x7 = 46 % 5      #求余数，x7=1
